Center gauge



J. A. KRIVACS.

CENTER GAUGE.

APPLICATION FILED AUG. 15. 1921.

1,410, 1 96. Patented Mar. 21, 1922.

- gvweuto'c $31 M Gamma UNITED STATES PATENT OFFICE.

JOSEPH A. KRIVAGS, 0F MOUNT VERNON, NEW YORK.

CENTER GAUGE.

Application filed. August 15, 1921. Serial No. 492,367.

To all whom it may concern:

Be it known that I, JosnPH A. KaIvAos, a citizen of the United States,residing at the village of Mount Vernon, county of Westchester, State ofNew York, have nvented an Improved Center Gauge, of which the followingis a specification.

My invention relates more particularly to that class of devices for theautomatic projection of a center line to a point in advance of the basecenter.

Among other objects of my mventlo-n is for example, to indicateautomatically the cutting center so that the material maybe laterallypositioned in a milling machine, and in a similar manner to project thecenter for other purposes, thus dispensing with measuring devices andcomputations as is now required.

My invention comprises a centrally disposed indicator blade, pointed inthe center at its front end, carried by'a lever extension or lazy armactuated by the lateral motion of a laterally adjustable frame; the rearends of which are adapted to adjustably grip the sides of the cutter ina milling machine or the sides of any object the center line of which isto be projected.

Having thus generally described my invention and the objects thereof 1will now particularly describe the same by reference to the annexeddrawing in which similar reference characters refer to identical parts.

Figure 1 shows a front view of my device with the side bars ofthe framepartially extended.

- Figure 2 is a side view of the same.

1 represents the indicator which is beveled at its front end to acentrally disposed point. Its rear end is provided with a guide slot 7,as shown, to provide the necessary travel of the indicator when the sameis being positioned.

The indicator 1 is pivotally mounted on the links 4, 4, of the leverextension or lazy arm, being retained in place by a shoulder screw 5which also secures the front ends of the links 4, 4, of the arm, thereverse ends of the links 4, 4, are, in a similar manner, secured to thefront ends of the links 3, 3, of the extension arm. The links 3, 3, arealso secured at their point of intersection, as shown, by a similarscrew 6, the shoulder of which slidabl engages in the slot 7 in theindicator 1. t their rear ends '2, at one end. At the rear end of bars2, 2,

lugs or sleeves 10, 10, are provided, each of which is shown as having aslotted opening to engage the side bar 2, and these are secured by thepins 11, 11.

The sleeves 10, 10 are adapted to engage the sides of the cutter of amilling machine and by their engagement they position the indicator toautomatically locate, on a projected line, the center for the lateraladjustment of the'material on a millin machine, or for any kindredpurpose whereln the projection of a center line may be required.

Having thus specified, shown and described the same I claim as novel andmy invention.

1. An automatic center gauge, comprising in combination, a frameconsisting of two side bars and a guide bar upon which one of said barsis slidably mounted for lateral adjustment, and the other is fixedthereto, a lazy arm pivotally carried by the frame, and an indicatorcentrally disposed on said lazy arm.

2. In a center gauge in combination a frame comprising a lateral guidearm one side arm slidably mounted thereon for later- 211 motion, and theother fixed thereto, a lazy arm pivotally secured to the frame, saidlazy arm being adapted to be projected by the lateral motion of theframe, and an adjustable indicating blade disposed at the extremity ofsaid lazy arm.

3. An automatic center gauge comprising in combination, a laterallyadjustable frame consisting of a lateral guide arm, a slide bar slidablymounted thereon adapted for lateral motion, another slide bar fixedthereto, an

indicator mounted on the frame adapted for I forward projection andmeans for positioning the indicator on a central line by the lateraladjustment of the frame.

Signed at New York, in the county of New York and State of New York,this 12th day of August, A. D. 1921.

JOSEPH A. KRIVAOS.

